** Also affects: linux (Ubuntu Artful)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1747507

Title:
  starting VMs causing retpoline4 to reboot

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  Fix Committed

Bug description:
  Using 4.13.0-33.36~retpoline4  kernel test kernel from ppa
  https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/spectre/.

  CPU: AMD Ryzen 7 1700 Eight-Core Processor
  Ubuntu: 17.10.

  Steps to reproduce (has occurred both times I tried it):
  1.  Just run kvm with no options (or virsh start <> or start VM from GUI)
  Machine reboots

  Going back to 4.13.0-32 has virsh working again. qemu-system-x86_64
  command works fine unless you use the enable kvm command.

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